fan never stops working

[Zé]

I have an Asus A2H, its a P4 2.8Ghz. 
 
Im using mandrake 10.2 Rc2 and have just updated my system 
( kernel-2.6.11.6mdk-1-1mdk)
 The problem is the fan never stops working, makes too noisy (think im going 
deaf), but as i remember since i use mandrake, since version 7, it always was 
like this. 
 
 If i go to Windows the laptop runs smoothly and the fan only works when is 
needed (compile and such). 
 
I already instaled lm_sensors and configured it (sensors-detect) but my fan 
continues working like before (never stops), its very annoying.

Any help?
-- 
Zé
Linux user #378762